This item adopts high-quality iron, Iron wire drawing process, lock body surface anti-corrosion, which is durable and beautiful. This lock is of high anti-theft, high safe, electronice control, key-turning manual unlocking, after-locking, prevention no-key-unlock and after-closing door prevention disassembling lock indoors. And it is suitable for residential buildings, public door, organs, schools, hotel building, factory warehouse and other departments. What are you waiting for? Features: The electronic-control door locks are made of high-quality stainless steel, having a double lock heads inside and outside. The lock body has on electric-control unlocking unit a spring adjusting balance unit. Both push button and knob for unlocking are available. When installing it, you may change the direction of the oblique lach according to the door's opening direction.(inwards or outwards). This lock is of high anti-theft, high safe, electronic-control, key-turning manual unlocking, after-locking, prevention no-key-unlock and after-closing door prevention disassembling lock indoors. It may be applicable to dwelling houses, especially high buildings, offices, schools, hotels, factories, warehouses, ect. It may also be used for electronic-control safety doors. High-quality iron, Iron wire drawing process, lock body surface anti-corrosion, durable and beautiful. Adopting the most advanced mechanical design, production technology in Taiwan. Can work with wood door, steel door, stainless steel door. Static electricity power consumption, long service life, strong security. Specification: Item Type: Electronic Door Lock Material: Metal Color: As picture shows Item Size: 16 * 10.5 * 4.2cm/6.29 * 4.13 * 1.65inch Working voltage: DC12V Instantaneous current: 1500 mAh Power-on time: 0.5 seconds (maximum allowable time 7 seconds) Applicable door type: metal door, fire door, security door. Package Weight: 1513g/53.36oz Package List: 1 * Electric lock 1 * Key cylinder 1 * Forend cap 3 * Keys 1 * Installation Accessories (screws) 1 * Iron Hoop 1 * Installation Instructions